Metal-working machine



July 30, 1929. c. c. GROTNES METAL WORKING MACHINE 2 sheets sheet 1 Filed Aug. 4, 1928 fnvahhl Carl (iroznes. 1, M w- July 30, 1929. c c GRQTNES 1,722,418

METAL WORKING MACHINE File Aug. 192a 2 sheets-sheet 2 Patented July 30, 1929.

UNITED STATES CARL C. GROTNES, OF CHICAGO, IELINOIS.

METAL-WORKING MACHINE.

Application filed August 4, 1928. Serial No. 297,470.

The invention pertains to ametal workis connected by a gear train 16 to said drive ing machine of the type shown in myprior Patent No. 1,604,346, dated October 26, 1926, and especially adapted for corrugat- In the use of such machine a serious difiiculty has been encountered due to a tendency on the part of the 1 drum or other work to creep longitudinally of its axis during the forming operation. In the case of a corrugating machine, such creeping movement causes the formation of spiral grooves in opposite ends of the drum,

resulting in a substantial loss in expensive tral sectional view through one end of a corrugating machine such as that shown in my said prior patent and illustrating the application of the anti-creeping means which I have provided.

Fig. 2 is a fragmentary transverse sectional View taken approximately in the plane of line 22 of Fig. 1.

Fig. 3 is a fragmentary side elevational View showing forming heads operable upon opposite ends of the work.

Figs. 4 and 5 are respectively front and top views of a device provided for preventing creeping of the Work.

Fig. 6 is a transverse sectional view through the device taken in the plane of line 6-6 of Fig. 4.

The machine comprises an elongated base or bed 7 having mounted in opposed relation two heads generally designated 8 and 8. Each head comprises a horizontal or stationary section 9 and a normally upright section 10, the latter being in the form of a rocker arm pivoted to swing on a horizontal axis 11 extending transversely of the base 7. Each horizontal section 9 has suitably mounted near its inner end a lower corrugating roll 12, and the upright section 10 has suitably mounted therein an upper corrugating roll 13.

Extending longitudinally of the bed at one side thereof is a drive shaft 14 driven from any suitable source of power. A shaft 15 carrying the lower roll 12 of each head shaft 14. In the forming operation therefore the lower rolls of each head are constantly driven.

The upper rolls of thetwo heads are adapted to be swung into and out of op'erative relation to the lower rolls by cam means associated with each head and driven from the shaft 14. The driving connection in each instance comprises a worm 17 fast on the shaft 14 andmeshing with the worm wheel 18 faston a transverse shaft" 19 suitably journaled in the lower horizontal sec tion 9 of each head. Each shaft 19 in turn carries a cam 20 operating on a follower 21 mounted on the upright section or rocker 10 f 'of each head. Weights (not shown) are connected by cables 21 (Fig. 3) with the,

upper portion of the heads and act to swing the heads upwardly as permitted by the cams 20.

The work indicated at A and herein shown in the form of. a metallic drum is placed in operative position upon the lower rolls 12 when the upper rolls 13 have been swungupwardly and I outwardly to positions at opposite ends of the work. The

work is held in position upon the lower adjusted longitudinally of the bed upon supporting brackets 25 2) so as to position the rolls with respect to the length of the work, the flanges 24 serving as abutmentsfor the ends of the work.

The anti-creeping means which I have provided to insure that the work shall not move longitudinally of its axis in one direction or the other during the forming operation, comprises an arcuate shoe 26 bolted onto the inner face of the upright section of each head as indicated clearly in Fig. 2. Each shoe is angular in cross-section as indicated in Fig. 6 and includes a vertical portion 27 and a horizontal portion or flange 28 adapted to project inwardly into the-end of the drum or other work A.

. The curvature of each shoe conforms substantially with the curvature of the work, and the arrangement is such that during the forming operation the end of the work enthe work.

gages during its rotation the vertical face portion 27 of the shoe and is prevented from riding upwardly over the flanges 2a of the guide rolls by the inwardly projecting flange. portion 28. By mounting the shoe on the movable-section of the head,vit is swung therewith into and out of operative relation to the work and thus does not interfere with the positioning of the work in the machine or its removal therefrom. In operative position, however, it coacts with the guide rolls 22 and 23 to prevent effectually the endwise movement of the drum relative to the rolls and thus insures against injury to A substantial saving is thus effected in the amount of scrap produced in a given run of the machine, while the means provided .to accomplish this result does not add appreciably to the cost of the machine.

I'claim as my invention: i

-1. A metal working machine of the character referred to comprising, in combination, a pair of heads mounted in longitudinally spaced relation and each having a forming roll rotatable on a fixed axis and a forming roll rotatable on an axis movable toward and from the fixed axis, guide rolls mounted.

formingrolls, one mounted for rotation on a fixed axis and the other mounted for rotation on a swlngable axls, means for supporting the work in position relative to said forming rolls, and means movable with the movable rolls into and out of operative association with the work to hold the same against endwise movement.

3.111 a metal working machine, the combination of two sets of forming rolls each having a roll mounted on a fixed axis and a roll mounted on a movable axis for movement into and out-of operative association with the stationary roll, guide rolls for posiventing endwise movement of the work relative to the forming rolls.

4. A metal Working machine having a stationary forming roll, means for positioning a drum upon said forming roll, a second forming roll movable into engagement with the inner peripheral surface of the drum upon a stationary roll, and an anti-creeping device mounted for movement with the movable roll into engagement with the drum to prevent endwise movement of the latter.

In testimony whereof, I have hereunto afiixed my signature.

oARL o. enorunsf 

